Section B, sample 0 (Ordovician of Canada)

Where: Nunavut, Canada (77.5° N, 84.0° W: paleocoordinates 0.9° N, 36.2° W)

• coordinate estimated from map

When: Amorphognathus ordovicicus conodont zone, Irene Bay Formation, Caradoc (460.9 - 449.5 Ma)

Environment/lithology: lithified, argillaceous limestone

• The Irene Bay Formation consists of about 83 m of recessive, greenish weathering, argillaceous limestone, and minor shale. A prolific shelly fauna, informally called the “Arctic Ordovician fauna”, occurs in the Irene Bay Formation and was regarded as late Caradoc in age (Kerr 1967).

Size class: microfossils

Primary reference: S. Zhang, K. Mirza, and C. R. Barnes. 2016. Upper Ordovician – Upper Silurian conodont biostratigraphy, Devon Island and southern Ellesmere Island, Canadian Arctic Islands, with implications for regional stratigraphy, eustasy, and thermal maturation. Canadian Journal of Earth Sciences 53(9):931-949 [E. Jarochowska/S. Haegele]more details

Purpose of describing collection: general faunal/floral analysis

PaleoDB collection 188104: authorized by Emilia Jarochowska, entered by Sarah Haegele on 24.08.2017

Creative Commons license: CC BY (attribution)

Taxonomic list

Conodonta
 Conodontophorida -
 Panderodontida - Panderodontidae
Belodina confluens Sweet 1979 conodont
Panderodus unicostatus Branson and Mehl 1933 conodont
"Panderodus recurvatus" = Panderodus panderi Stauffer 1940 conodont
Panderodus liratus/recurvatus
 Prioniodontida - Balognathidae
Amorphognathus ordovicicus Bergström and Bergström 1996 conodont
 Protopanderodontida -
Drepanoistodus suberectus Branson and Mehl 1933 conodont